In this July 14, 2012 file photo, President Obama holds a campaign... Photo-3693052.51893 - SFGate

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In this April 23, 2012 file photo, President Obama strikes the Heisman pose after he awarded the Commander-in-Chief Trophy to the Air Force Academy football team in the East Room of the White House in Washington. less

In this April 23, 2012 file photo, President Obama strikes the Heisman pose after he awarded the Commander-in-Chief Trophy to the Air Force Academy football team in the East Room of the White House in ... more

In this Oct. 16, 2012 file photo, Republican presidential candidate, former Massachusetts Gov. Mitt Romney and President Barack Obama spar during the second presidential debate at Hofstra University in Hempstead, N.Y.

In this Oct. 16, 2012 file photo, Republican presidential candidate, former Massachusetts Gov. Mitt Romney and President Barack Obama spar during the second presidential debate at Hofstra University in